Atomic entanglement sudden death in a strongly driven cavity QED system

TL;DR

This paper investigates how entanglement between atoms in a cavity QED system suddenly disappears under strong driving conditions, revealing that ESD occurs when atom-field coupling exceeds detuning, regardless of initial states.

Contribution

It demonstrates the conditions under which atomic entanglement sudden death occurs in strongly driven cavity QED systems, highlighting the role of coupling and detuning.

Findings

ESD occurs when atom-field coupling exceeds detuning

ESD is independent of initial atomic state

Strong driving influences entanglement dynamics

Abstract

We study the entanglement dynamics of strongly driven atoms off-resonantly coupled with cavity fields. We consider conditions characterized not only by the atom-field coupling but also by the atom-field detuning. By studying two different models within the framework of cavity QED, we show that the so-called atomic entanglement sudden death (ESD) always occurs if the atom-field coupling lager than the atom-field detuning, and is independent of the type of initial atomic state.